Barrel lock and feed ramp device



April 13, 1965 R. A. GILLESPIE BARREL LOCK AND FEED RAMP DEVICE Filed March 20, 1964 NN Wm N R \m M N m 140 r/////Z 3/ m mm INVENTOR. ROBERT A. GILLESP/E Y B .glz -{j A 7' TO/PNEV Patented Apr. 13, 1965 3,177,603 BARREL LOCK AND FEED RAMP DEVICE Robert A. Gillespie, Cobourg, Ontario, Canada, assignor to ()lin Mathieson Chemical Corporation, a corporation of Virginia Filed Mar. 20, 1964, Ser. No. 353,552 3 Claims. (01.42

The present invention relates to firearms and in particular to a novel lock for securing a rifle barrel to a receiver.

The lock device of the invention is a dual purpose member in that it (a) effects a very simple take-down sequence and (b) provides a ramp or guide for facilitating the feeding of a cartridge into the rifle chamber.

A firearm embracing certain features of the present invention may comprise a receiver and a barrel, said receiver having a clearance opening and a magazine port, said barrel having a cartridge chamber and notch, said barrel being operative to telescope into the receiver, a clamp member or barrel lock comprising a clip having a pair of'lugs, a first lug being operative to project through said clearance opening and engage said notch, a second lug being operative to project into said magazine port operative to provide a rear abutment for the barrel, screw means for connecting the clip to the receiver effective in cooperation with said lugs to retain the barrel fixed relative to the receiver, said second lug being provided with a feed ramp operative to guide a cartridge into the cartridge chamber.

Other features and advantages of the present invention will become more apparent from an examination of the succeeding specification when read in conjunction with the appended drawings in which:

FIG. 1 is a side view of a rifle embracing the principles of the present invention;

FIG. 2 is a vertical section of FIG. 1 as viewed in the plane of the line 22, and;

FIG. 3 is a vertical section of FIG. 2 as viewed in the plane of the line 3-3 and in the direction shown by the arrows.

Referring now to the drawings, and in particular to FIG. 1, there is shown a semi-automatic (blow back) rirnfire 22 caliber rifle having a one-piece stock 11, a receiver 12, a bolt 13, a bolt handle 14, box magazine 16, magazine release 17, trigger guard 18, barrel 19, rear sight 21, and take-down screw 22.

In FIG. 3 it is apparent that the barrel 19, provided with notch 23, is telescopically accepted in the receiver 12. The barrel is fixed and positioned to the receiver by a barrel lock defining a clamp member or clip indicated generally by the reference numeral 24.

The clamp member 24 has a double or dual function in that it provides a barrel key or lock and a cartridge feed ramp.

The clamp member includes a first lug or key 26 projecting through a clearance opening 27 in the receiver operative to engage a notch 23 formed in the barrel. A second lug 28 projects through a magazine port 29 abutting the receiver at 31 and providing a rear abutment for the barrel as at 32. The lugs 26 and 28 are joined by a web 33 and a first screw 34 makes a threaded con nection with the receiver 12 effective to lock the barrel to the receiver and effective to hold the barrel relative to the receiver in the position shown. The barrel is held against rotational and axial motion.

Considering FIGS. 2 and 3 together, it is apparent that the second lug 28 is formed with a cutout or way 36 providing a feed ramp or guide operative to facilitate feeding a cartridge C into a cartridge chamber 37. The first screw 34 is drilled and tapped to receive a takedown screw (second screw) 22 operative in combination with an escutcheon 39 to secure the stock 11 to the receiver.

For purposes of convenience in claiming the present invention the first screw 34 and screw 22 may sometimes be referred to broadly as screw means.

In summary, the present invention provides an exceedingly simple receiver-barrel locking and positioning means. The novel design of the lugs, particularly the lug 28, provides structure effecting a cartridge feeding function in addition to the locking function.

It is anticipated that a wide variety of modifications of the present invention may be devised without departing from the spirit and scope thereof.

What is claimed is:

1. In a firearm including a receiver and a barrel, said receiver having a clearance opening and a magazine port, said barrel having a cartridge chamber and a notch, said barrel being operative to telescope into the receiver, a combined cartridge feed ramp and barrel lock comprising a clip having a pair of lugs, a first lug being operative to project through said clearance opening and engage said notch, a second lug being operative to project through said magazine port operative to provide a rear abutment for the barrel, screw means for connecting the clip to the receiver efiective in cooperation with said lugs to retain the barrel fixed relative to the receiver, said second lug being provided with a feed ramp operative to guide a cartridge into said chamber.

2. In a firearm including a receiver, a stock, and a barrel, said receiver having a clearance opening and a magazine port, said barrel having a cartridge chamber and a notch, said barrel being operative to telescope in the receiver, and said stock being operative to support the barrel and receiver, a combined cartridge feed ramp and barrel lock comprising a clip having a pair of opposed lugs, a first lug being operative to project through the clearance opening and engage said notch, a second lug being operative to project through said magazine port operative to provide a rear abutment for the barrel, a first screw means for connecting the clip to the receiver effective in cooperation with said lugs to retain the barrel fixed relative to the receiver, said second lug being provided with a ramp operative to guide cartridges into said chamber and a second screw means for fixing the clip to the stock.

3. In a firearm including a stock, a receiver, a barrel having a chamber and a notch operable to telescope into said receiver, said receiver having a slot, and a magazine port through which ammunition is fed to the chamber, a magazine disposed in said port and connected to the receiver, said receiver, magazine and barrel being operable to bed upon the stock, an improved barrel-stock lock means comprising a clip having two arms, one arm being operative to project through said slot in the receiver to engage said barrel notch, the other arm projecting into said magazine port to provide an abutment for the barrel, said second arm being formed with a cut-out to provide a feed ramp with side walls operative to guide a round of ammunition into the chamber, a first screw means for making a threaded connection between the clip and the receiver to retain the barrel locked to the receiver,

and a second screw means cooperating with the first screw means and with the stock for retaining the receiver and barrel bedded in the stock.

No references cited.

BENJAMIN A. BORCHELT, Primary Examiner. 

1. IN A FIREARM INCLUDING A RECEIVER AND A BARREL, SAID RECEIVER HAVING A CLEARANCE OPENING AND A MAGAZINE PORT, SAID BARREL HAVING A CARTRIDGE CHAMBER AND A NOTCH, SAID BARREL BEING OPERATIVE TO TELESCOPE INTO THE RECEIVER, A COMBINED CARTRIDGE FEED RAMP AND BARREL LOCK COMPRISING A CLIP HAVING A PAIR OF LUGS, A FIRST LUG BEING OPERATIVE TO PROJECT THROUGH SAID CLEARANCE OPENING AND ENGAGE SAID NOTCH, A SECOND LUG BEING OPERATIVE TO PROJECT THROUGH SAID MAGAZINE PORT OPERATIVE TO PROVIDE A REAR ABUTMENT FOR THE BARREL, SCREW MEANS FOR CONNECTING THE CLIP TO THE RECEIVER EFFECTIVE IN COOPERATION WITH SAID LUGS TO RETAIN THE BARREL FIXED RELATIVE TO THE RECEIVER, SAID SECOND LUG BEING PROVIDED WITH A FEED RAMP OPERATIVE TO GUIDE A CARTRIDGE INTO SAID CHAMBER. 